class_docstr: A mock model of model class for TcavTest class.
    
docstr: Returning one label.
  
  Args:
    target_class: dummy target_class
  
  Returns:
    zero.
docstr_tok: ["Returning","one","label",".","Args",":","target_class",":","dummy","target_class","Returns",":","zero","."]
code: def label_to_id(self, target_class):
      """Returning one label.
  
      Args:
        target_class: dummy target_class
  
      Returns:
        zero.
      """
      return 0
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from tcav.activation_generator import ActivationGeneratorBase
  from tcav.cav import CAV
  from tcav.tcav import TCAV
  from tensorflow.python.platform import googletest
  import numpy
  import tensorflow
label_desc: Use image node_id 3 for calling the TcavTest_model obj's underlying member method code with example usage: obj.label_to_id(target_class) and returns: int